The EPA pulled off the feat by sharply increasing the amount of oxygen-poor exhaust that is recirculated into the combustion chamber and increasing the pressure of the fuel being forced into the cylinder.

FORBES: EPA, Inc.

Tuesday's first launch attempt was aborted because of low pressure in the combustion chamber.

NPR: SpaceX Makes Progress with Rocket Test

The first attempt to launch the rocket was halted Saturday when a flight computer detected high pressure in an engine combustion chamber.

CNN: Historic launch of private rocket heralds new era

The difference between turbocharging and supercharging is simple: a turbocharger boosts engine air pressure by using exhaust gas to power a turbine that pushes more air into the combustion chamber.

FORBES: 2012 Audi A7 Test Drive and Review - High-Tech Meets High Style